I have had the same problem.
Check out Brownell's website. They have replacement sights for 1911s that are essentially the same as the issue sight, but taller and wider, therefore easier to pick up.
The rear sight slides in and out with a little discrete tapping, the front sight must be yanked and the new one re-staked. You can do it at home, but it's easier with proper staking equipment.
And I agree with the good visibility fixed sight program. I've used that system for some thirty years now, a decent 45 with hardball will hit a sillouette target out to 100 yards with good fixed sights. For competition, one might demand more, but not for real life.